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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * To change this template, choose Tools | Templates</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> * and open the template in the editor.</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <strong class="jxr_keyword">package</strong> com.googlecode.npuzzle.logic.astar;
<a class="jxr_linenumber" name="6" href="#6">6</a>   
<a class="jxr_linenumber" name="7" href="#7">7</a>   <strong class="jxr_keyword">import</strong> com.googlecode.npuzzle.logic.PuzzleState;
<a class="jxr_linenumber" name="8" href="#8">8</a>   <strong class="jxr_keyword">import</strong> com.googlecode.npuzzle.logic.heuristic.ManhattanHeuristic;
<a class="jxr_linenumber" name="9" href="#9">9</a>   <strong class="jxr_keyword">import</strong> com.googlecode.npuzzle.logic.heuristic.Heuristic;
<a class="jxr_linenumber" name="10" href="#10">10</a>  <strong class="jxr_keyword">import</strong> java.util.HashSet;
<a class="jxr_linenumber" name="11" href="#11">11</a>  <strong class="jxr_keyword">import</strong> java.util.Set;
<a class="jxr_linenumber" name="12" href="#12">12</a>  
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_javadoccomment"> * @author thiago</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../com/googlecode/npuzzle/logic/astar/NodeImpl.html">NodeImpl</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../com/googlecode/npuzzle/logic/astar/Node.html">Node</a> {
<a class="jxr_linenumber" name="18" href="#18">18</a>  
<a class="jxr_linenumber" name="19" href="#19">19</a>      <strong class="jxr_keyword">private</strong> <a href="../../../../../com/googlecode/npuzzle/logic/heuristic/Heuristic.html">Heuristic</a> heuristicCost;
<a class="jxr_linenumber" name="20" href="#20">20</a>      <strong class="jxr_keyword">private</strong> <a href="../../../../../com/googlecode/npuzzle/logic/PuzzleState.html">PuzzleState</a> state;
<a class="jxr_linenumber" name="21" href="#21">21</a>  
<a class="jxr_linenumber" name="22" href="#22">22</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../com/googlecode/npuzzle/logic/astar/NodeImpl.html">NodeImpl</a>(<a href="../../../../../com/googlecode/npuzzle/logic/PuzzleState.html">PuzzleState</a> state) {
<a class="jxr_linenumber" name="23" href="#23">23</a>          <strong class="jxr_keyword">this</strong>.state = state;
<a class="jxr_linenumber" name="24" href="#24">24</a>          <strong class="jxr_keyword">this</strong>.heuristicCost = <strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/npuzzle/logic/heuristic/ManhattanHeuristic.html">ManhattanHeuristic</a>();
<a class="jxr_linenumber" name="25" href="#25">25</a>      }
<a class="jxr_linenumber" name="26" href="#26">26</a>  
<a class="jxr_linenumber" name="27" href="#27">27</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../com/googlecode/npuzzle/logic/astar/NodeImpl.html">NodeImpl</a>(<a href="../../../../../com/googlecode/npuzzle/logic/PuzzleState.html">PuzzleState</a> state, <a href="../../../../../com/googlecode/npuzzle/logic/heuristic/Heuristic.html">Heuristic</a> heuristicCost) {
<a class="jxr_linenumber" name="28" href="#28">28</a>          <strong class="jxr_keyword">this</strong>.state = state;
<a class="jxr_linenumber" name="29" href="#29">29</a>          <strong class="jxr_keyword">this</strong>.heuristicCost = heuristicCost;
<a class="jxr_linenumber" name="30" href="#30">30</a>      }
<a class="jxr_linenumber" name="31" href="#31">31</a>  
<a class="jxr_linenumber" name="32" href="#32">32</a>      @Override
<a class="jxr_linenumber" name="33" href="#33">33</a>      <strong class="jxr_keyword">public</strong> Set&lt;Node&gt; getNeighbours() {
<a class="jxr_linenumber" name="34" href="#34">34</a>          Set&lt;Node&gt; set = <strong class="jxr_keyword">new</strong> HashSet&lt;Node&gt;();
<a class="jxr_linenumber" name="35" href="#35">35</a>          <strong class="jxr_keyword">int</strong> pos = state.emptyBlock();
<a class="jxr_linenumber" name="36" href="#36">36</a>          <a href="../../../../../com/googlecode/npuzzle/logic/PuzzleState.html">PuzzleState</a> aux = state.copyState();
<a class="jxr_linenumber" name="37" href="#37">37</a>          aux.moveUp(pos);
<a class="jxr_linenumber" name="38" href="#38">38</a>          addToSet(aux, set);
<a class="jxr_linenumber" name="39" href="#39">39</a>          aux = state.copyState();
<a class="jxr_linenumber" name="40" href="#40">40</a>          aux.moveDown(pos);
<a class="jxr_linenumber" name="41" href="#41">41</a>          addToSet(aux, set);
<a class="jxr_linenumber" name="42" href="#42">42</a>          aux = state.copyState();
<a class="jxr_linenumber" name="43" href="#43">43</a>          aux.moveLeft(pos);
<a class="jxr_linenumber" name="44" href="#44">44</a>          addToSet(aux, set);
<a class="jxr_linenumber" name="45" href="#45">45</a>          aux = state.copyState();
<a class="jxr_linenumber" name="46" href="#46">46</a>          aux.moveRight(pos);
<a class="jxr_linenumber" name="47" href="#47">47</a>          addToSet(aux, set);
<a class="jxr_linenumber" name="48" href="#48">48</a>          <em class="jxr_comment">/*<em class="jxr_comment">addToSet(move(pos, pos - 3, state), set);</em></em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_comment">        addToSet(move(pos, pos + 3, state), set);</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_comment">        addToSet(move(pos, pos - 1, state), set);</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_comment">        addToSet(move(pos, pos + 1, state), set);*/</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  
<a class="jxr_linenumber" name="53" href="#53">53</a>          <strong class="jxr_keyword">return</strong> set;
<a class="jxr_linenumber" name="54" href="#54">54</a>      }
<a class="jxr_linenumber" name="55" href="#55">55</a>  
<a class="jxr_linenumber" name="56" href="#56">56</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> addToSet(<a href="../../../../../com/googlecode/npuzzle/logic/PuzzleState.html">PuzzleState</a> aux, Set&lt;Node&gt; set) {
<a class="jxr_linenumber" name="57" href="#57">57</a>          <strong class="jxr_keyword">if</strong> (aux != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="58" href="#58">58</a>              set.add(<strong class="jxr_keyword">new</strong> <a href="../../../../../com/googlecode/npuzzle/logic/astar/NodeImpl.html">NodeImpl</a>(aux));
<a class="jxr_linenumber" name="59" href="#59">59</a>          }
<a class="jxr_linenumber" name="60" href="#60">60</a>      }
<a class="jxr_linenumber" name="61" href="#61">61</a>  
<a class="jxr_linenumber" name="62" href="#62">62</a>      @Override
<a class="jxr_linenumber" name="63" href="#63">63</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> compareTo(<a href="../../../../../com/googlecode/npuzzle/logic/astar/Node.html">Node</a> o) {
<a class="jxr_linenumber" name="64" href="#64">64</a>          <strong class="jxr_keyword">float</strong> f = heuristic + cost;
<a class="jxr_linenumber" name="65" href="#65">65</a>          <strong class="jxr_keyword">float</strong> of = o.heuristic + o.cost;
<a class="jxr_linenumber" name="66" href="#66">66</a>  
<a class="jxr_linenumber" name="67" href="#67">67</a>          <strong class="jxr_keyword">if</strong> (f &lt; of) {
<a class="jxr_linenumber" name="68" href="#68">68</a>              <strong class="jxr_keyword">return</strong> -1;
<a class="jxr_linenumber" name="69" href="#69">69</a>          } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (f &gt; of) {
<a class="jxr_linenumber" name="70" href="#70">70</a>              <strong class="jxr_keyword">return</strong> 1;
<a class="jxr_linenumber" name="71" href="#71">71</a>          } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="72" href="#72">72</a>              <strong class="jxr_keyword">return</strong> 0;
<a class="jxr_linenumber" name="73" href="#73">73</a>          }
<a class="jxr_linenumber" name="74" href="#74">74</a>      }
<a class="jxr_linenumber" name="75" href="#75">75</a>  
<a class="jxr_linenumber" name="76" href="#76">76</a>      @Override
<a class="jxr_linenumber" name="77" href="#77">77</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> equals(Object obj) {
<a class="jxr_linenumber" name="78" href="#78">78</a>          <strong class="jxr_keyword">if</strong> (obj == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="79" href="#79">79</a>              <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="80" href="#80">80</a>          }
<a class="jxr_linenumber" name="81" href="#81">81</a>          <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong> == obj) {
<a class="jxr_linenumber" name="82" href="#82">82</a>              <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="83" href="#83">83</a>          }
<a class="jxr_linenumber" name="84" href="#84">84</a>  
<a class="jxr_linenumber" name="85" href="#85">85</a>          <strong class="jxr_keyword">final</strong> <a href="../../../../../com/googlecode/npuzzle/logic/astar/NodeImpl.html">NodeImpl</a> other = (NodeImpl) obj;
<a class="jxr_linenumber" name="86" href="#86">86</a>  
<a class="jxr_linenumber" name="87" href="#87">87</a>          <strong class="jxr_keyword">return</strong> state.equals(other.state);
<a class="jxr_linenumber" name="88" href="#88">88</a>      }
<a class="jxr_linenumber" name="89" href="#89">89</a>  
<a class="jxr_linenumber" name="90" href="#90">90</a>      @Override
<a class="jxr_linenumber" name="91" href="#91">91</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> hashCode() {
<a class="jxr_linenumber" name="92" href="#92">92</a>          <strong class="jxr_keyword">int</strong> hash = 5;
<a class="jxr_linenumber" name="93" href="#93">93</a>          hash = 67 * hash + (<strong class="jxr_keyword">this</strong>.state != <strong class="jxr_keyword">null</strong> ? <strong class="jxr_keyword">this</strong>.state.hashCode() : 0);
<a class="jxr_linenumber" name="94" href="#94">94</a>          <strong class="jxr_keyword">return</strong> hash;
<a class="jxr_linenumber" name="95" href="#95">95</a>      }
<a class="jxr_linenumber" name="96" href="#96">96</a>  
<a class="jxr_linenumber" name="97" href="#97">97</a>      @Override
<a class="jxr_linenumber" name="98" href="#98">98</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">float</strong> costDifference(<a href="../../../../../com/googlecode/npuzzle/logic/astar/Node.html">Node</a> other) {
<a class="jxr_linenumber" name="99" href="#99">99</a>          <strong class="jxr_keyword">return</strong> manhattanDistance(state, ((NodeImpl) other).state);
<a class="jxr_linenumber" name="100" href="#100">100</a>     }
<a class="jxr_linenumber" name="101" href="#101">101</a> 
<a class="jxr_linenumber" name="102" href="#102">102</a>     <strong class="jxr_keyword">private</strong> Integer manhattanDistance(<a href="../../../../../com/googlecode/npuzzle/logic/PuzzleState.html">PuzzleState</a> first, <a href="../../../../../com/googlecode/npuzzle/logic/PuzzleState.html">PuzzleState</a> second) {
<a class="jxr_linenumber" name="103" href="#103">103</a>         <strong class="jxr_keyword">return</strong> (<strong class="jxr_keyword">int</strong>) heuristicCost.getCost(first, second);
<a class="jxr_linenumber" name="104" href="#104">104</a>     }
<a class="jxr_linenumber" name="105" href="#105">105</a> 
<a class="jxr_linenumber" name="106" href="#106">106</a>     @Override
<a class="jxr_linenumber" name="107" href="#107">107</a>     <strong class="jxr_keyword">public</strong> String toString() {
<a class="jxr_linenumber" name="108" href="#108">108</a>         <strong class="jxr_keyword">return</strong> state.toString();
<a class="jxr_linenumber" name="109" href="#109">109</a>     }
<a class="jxr_linenumber" name="110" href="#110">110</a> 
<a class="jxr_linenumber" name="111" href="#111">111</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../com/googlecode/npuzzle/logic/PuzzleState.html">PuzzleState</a> getState() {
<a class="jxr_linenumber" name="112" href="#112">112</a>         <strong class="jxr_keyword">return</strong> state.copyState();
<a class="jxr_linenumber" name="113" href="#113">113</a>     }
<a class="jxr_linenumber" name="114" href="#114">114</a> }
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